Types of pneumatic valves and maintenance

Pneumatic valves are devices that intercept, regulate and control the fluid.

These valves can be applied in numerous industry sectors, from the wood industry to the glass industry, to the tobacco industry, industrial washing and drying and much more.

Here you can find the complete installation manual.

Installation of pneumatic valves

Each valve is made for a specific purpose, so it is essential that its function corresponds to the intended use for which it was designed.

As for the handling of the valve, it depends on the weight and the size: it is necessary to provide an adequate transport, avoiding that the product may fall and injure the operator, or get damaged.

The product should always be handled by the body, avoiding the grip on parts that can be easily damaged as signaling rods or switch box.

As for butterfly valves, we recommend mounting them with the disc in the closing position.

If the connection to the line is made with parts made of different material than that which composes the valve, it is good to verify that there is compatibility between the coupled materials.

Maintenance of pneumatic valves

Now, let’s talk about maintenance of all our types of pneumatic valves.

Before performing any operation, it is good to ensure that the plant is not in operation.

Once this is done, you can proceed:

Completely isolate the part of the equipment where the valve is installed, put to zero the pressure of the fluid (or discharge completely the vacuum in case this is the fluid), furthermore wait till the temperature has reache an acceptable level.
Stop and isolate the air compressed circuit; dicharge the pressure still present inside the actuator and remove the supply connector(s) from the actuator.

Ball valves and butterfly valves’ maintenance

As for ball and butterfly valves, the maintenance essentially involves the gasket-set replacement. For what concerns the valve-body, this operation is not recommended because it is difficult and not profitable. We think it’s better to replace the whole piece.

Maintenance of piston valves

For this category the valve body doesn’t need any service, because all replacing parts (gasket, etc) are located in the actuator.

We suggest you to follow this sequence:

unscrew the actuator from the body of the valve;
unscrew the nut into the end of the piston rod to proceed with the extraction of the seal holder and tge replacement of the seal togheter with the rear o ring;
in order to replace remaning parts of the revision kit, it is necessary to remove the piston from the cylinder-actuator

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